OF ARKANSAS. 51 
and temperature, and capable of supplying a considerable amount of 
machinery. 
The high Pine ridge, capped with subcarboniferous chert, resting on 
the sandstone previously mentioned, extends for four miles between the 
heads of Sugar-loaf creek and those of George’s creek; the pine being 
co-extensive with the area occupied by these higher siliceous rocks. 
The white encrinital and marble rock of this region, may be very con- 
veniently quarried in a hill just beyond this pine ridge, near Wood’s mill, 
where it outcrops towards the top of the hill, with a gentle slope, which 
affords an opportunity of quarrying it with but little stripping. Also in 
some of the ridges, near the Hudson farm and the “ New York Location,” 
on the waters of Sugar-loaf creek. 
The strata composing the lower part of the hills between Yellville and 
Wood’s mill, are chiefly marly, earthy and hydraulic-looking calcareous 
rocks, very retentive of water, which flows out along the surface of the 
plane of dip in numerous springs. The country has a glady aspect, and 
the roads are soft and miry, except where they run on the bare rock. 
These strata have much the character of marly, shaly limestones, 
described as intervening between the subcarboniferous rocks and the 
strata of silurian date in south-western Missouri, and may be of the same 
age, but, as yet, we have no positive evidence of equivalency, in the 
absence of the necessary paleontological evidence. The fossil nautili 
which have been found in chert near Mickersham’s mill, about 2 miles 8S. 
W. of Yellville, indicate rocks of the subcarboniferous era, proving the 
south-westerly inclination of the strata, which may account for rocks of 
devonian (?) and subcarboniferous age being found here low in the hills, 
while they occupy high ‘situations in the north and north-eastern part of 
Marion county. 
Lee’s mountain was found to be, by measurement with the aneroid 
barometer, 350 feet above our camp, near John Osburn’s farms, on Jen- 
ning’s creek.* 
The ascent of this mountain from Fallen Timber creek, on the east, is 
very steep. Towards the summit level of the road, there are alternations 
of sandstone amongst the limestone, and higher up, near the summit of 
the ridge to the south, the marble rock is in place. The sandstone below 
this rock must be much thicker here than in the ridges along Sugar-loaf 
creek, and the rocks elevated some fifty feet higher above the drainage of 
the country than on Sugar-loaf creek. 
The “ Molton Diggings,” on Jennings’ creek, are a mile and a half above 
*T his observation was taken on the 4th of December, at noon, in the midst of a heavy shower of 
rain, and, therefore, may be liable to some correction hereafter. 
